package com.utils;

import java.security.MessageDigest;

import org.apache.shiro.crypto.hash.SimpleHash;

/**
 * Created by 再壮 on 2018/6/10.
 */
public class PasswordUtil {

    public String StrToMD5(String key) {
        char hexDigits[] = {
                '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'
        };
        try {
            byte[] btInput = key.getBytes();
            // 获得MD5摘要算法的 MessageDigest 对象
            MessageDigest mdInst = MessageDigest.getInstance("MD5");
            // 使用指定的字节更新摘要
            mdInst.update(btInput);
            // 获得密文
            byte[] md = mdInst.digest();
            // 把密文转换成十六进制的字符串形式
            int j = md.length;
            char str[] = new char[j * 2];
            int k = 0;
            for (int i = 0; i < j; i++) {
                byte byte0 = md[i];
                str[k++] = hexDigits[byte0 >>> 4 & 0xf];
                str[k++] = hexDigits[byte0 & 0xf];
            }
            return new String(str);
        } catch (Exception e) {
            return null;
        }
    }
    
    public static String getStr2HashName(String hashAlgorithmName,String source,String salt,int hashIterations){
         Object obj = new SimpleHash(hashAlgorithmName, source, salt, hashIterations);
         return obj.toString();
    }
    
    public static void main(String[] args) {
    	 Object obj = new SimpleHash("MD5", "admin", "admin", 1);
    	 System.out.println(obj.toString());
	}
}
